Many different products are made from acrylic, including shower doors, bath enclosures, windows, and skylights. It is many times stronger than glass, making it much more impact resistant and therefore safer. Falling against a shower door will not likely break it, for example; baseballs that would otherwise crash through glass windows will, in most cases, just bounce off acrylic windows. It also insulates better than glass, potentially saving on heating bills.
Acrylic glass is also very clear, allowing 92% of visible light to pass through it. Very thick glass will have a green tint, while acrylic remains clear. It also weathers well, keeping its clarity over the years without turning yellow or breaking down when exposed to sunlight over a long period of time.
Another advantage of acrylic is that it is only half as heavy as glass. This makes this material easier to work with, and makes it a better choice for projects where weight is an issue. It can also be sawed, whereas glass must be scored.
Virtually all major public aquariums now build display tanks out of this thermoplastic, and it is often used in many other buildings. When this material is just over 1 inch thick (about 25 mm), it is bullet resistant; the presidential motorcade, the pope's booth-vehicle, teller enclosures, and drive-through window enclosures all feature bullet-resistant acrylic. It is used for airplane windows as well.